The authorities are hunting today for the militants who killed at least 70 people — more than twice as many deaths as in the Brussels attacks last week — at a park in Lahore, Pakistan’s second largest city.

About 300 people were wounded. The death toll is expected to rise.

A splinter faction of the Pakistani Taliban claimed responsibility for the blast, and its spokesman said the assault was targeting Christians on Easter.

A tentative deal by California lawmakers to raise the state’s minimum wage could be announced as soon as today. The wage, which was raised to $10 on Jan. 1, would increase incrementally to $15 over the next six years.

If approved, California would become the first state to adopt a $15-an-hour minimum wage.

Business

• As Apple and the F.B.I. fight over an order to unlock the iPhone used by a gunman in California, European governments are pushing for greater access to personal data.

• San Francisco has become a must-visit destination for foreign officials and others looking into recycling practices.

Back Story

The exhibit “Dada Universal” ends today at the Swiss National Museum, but there are many others this year coinciding with the centennial of Dada, the influential artistic movement that mocked conventions.

Marcel Duchamp’s “Fountain” became an icon of 20th-century art.CreditSwiss National Museum

Switzerland was an unusual home for a global rebellion, but World War I was laying waste to Western Europe and a group of artists had gathered in the neutral country. Some were exiles fleeing fighting.

They shared an opposition to the war, societal norms and hierarchies in the arts.

Nationalistic tendencies, they believed, had caused the war. In abstraction, they found a universal language to respond to warfare.

Rejecting a strict definition of “art,” they experimented with new materials and innovative techniques. Montages, collages and found objects were favored. That’s how a urinal — Marcel Duchamp’s “Fountain” — became an icon of 20th-century art.

Some believe that the word Dada originated from the Romanian for “yes, yes,” so it skewers yes-men, but it also invites anyone to join and define art as they wish. Tristan Tzara, a Dada founder, was Romanian.

The movement waned in the 1920s. But many artists say it remains a source of inspiration today, and is still very much alive.